US4973703AExpiredUtility

Process for purification of N-cyano-N'-methyl-N"-(2-((5-methyl-1Himidazol-4-yl)methylthio)ethyl)guanidine

67
Assignee: MITSUI PETROCHEMICAL INDPriority: Nov 4, 1987Filed: Nov 4, 1988Granted: Nov 27, 1990
Est. expiryNov 4, 2007(expired)· nominal 20-yr term from priority
Inventors:Junichi ImutaNoriaki KiharaTakeshi Ishitoku
C07D 233/64
67
PatentIndex Score
6
Cited by
4
References
7
Claims

Abstract

A process for the purification of N-cyano-N'-methyl-N"-[2-{(5-methyl-1H-imidazol-4-yl)methylthio}-ethyl]guanidine, which comprises bringing a crude product of N-cyano-N'-methyl-N"-[2-{(5-methyl-1H-imidazol-4-yl)-methylthio}ethyl]guanidine into contact with activated carbon in water in the presence of an organic acid.

Claims

exact text as granted — not AI-modified
What we claim is: 
     
       1. A process for the purification of N-cyano-N'-methyl-N"-[2-{(5-methyl-1H-imidazol-4-yl)methylthio}ethyl]guanidine, which comprises bringing a crude product of N-cyano-N'-methyl-N"-[2-{(5-methyl-1H-imidazol-4-yl)methylthio}ethyl]guanidine into contact with activated carbon in water in the presence of an organic acid. 
     
     
       2. The process of claim 1 wherein the organic acid is an organic carboxylic acid. 
     
     
       3. The process of claim 1 wherein the organic acid is an aliphatic carboxylic acid. 
     
     
       4. The process of claim 1 wherein the organic acid is used in a proportion of 1 to 100 mols per mol of N-cyano-N'-methyl-N"-[2-{(5-methyl-1H-imidazol-4-yl)methylthio}ethyl]guanidine. 
     
     
       5. The process of claim 1 wherein the activated carbon is used in a proportion of 0.01 to 100 parts by weight per part by weight of N-cyano-N'-methyl-N"-[2-{(5-methyl-1H-imidazol-4-yl)methylthio}ethyl]guanidine. 
     
     
       6. The process of claim 1 wherein the contact is carried out at a temperature of 0° to 150° C. 
     
     
       7. The process of claim 1 wherein the contact time is 0.1 to 50 hours.

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